CN114232644A - Internal force adjusting method for arch foundation pit supporting system - Google Patents
Internal force adjusting method for arch foundation pit supporting system Download PDFInfo
- Publication number
- CN114232644A CN114232644A CN202210060425.6A CN202210060425A CN114232644A CN 114232644 A CN114232644 A CN 114232644A CN 202210060425 A CN202210060425 A CN 202210060425A CN 114232644 A CN114232644 A CN 114232644A
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- Prior art keywords
- arch
- foundation pit
- supporting system
- pit supporting
- prestress
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000009412 basement excavation Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002689 soil Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0006—Plastics
- E02D2300/0007—PVC
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a method for adjusting the internal force of an arch foundation pit supporting system; the specific operation steps of this patent are: (1) constructing an arch foundation pit supporting system, and reserving a tie bar cable duct by adopting a PVC pipe when constructing to the top surface of an arch base; (2) excavating a foundation pit, and installing a prestress tie rod cable after excavating to a depth; (3) tensioning the prestress tie rod cable according to the design load; (4) and continuously excavating the foundation pit to the designed depth. According to the method, the prestressed system rod cable is arranged at the arch support of the arch foundation pit supporting system, the horizontal thrust of part of the arch supporting system is balanced by tensioning the prestressed system rod cable, the displacement of the arch top of the foundation pit along the tangential direction of the arch support is restrained, and the effects of optimizing a structural stress system, reducing the section size of the arch support and improving the safety and stability of the foundation pit system are achieved.
Description
Technical Field
The invention relates to the technical field related to arch foundation pit construction, in particular to an internal force adjusting method of an arch foundation pit supporting system.
Background
The arch foundation pit supporting system is arranged into an arch, the water and soil load behind the supporting system is converted into arch axial force by utilizing the arch effect, and the axial force of the angular point of a large foundation pit supporting structure can reach tens of thousands of tons. At present, the arch foundation pit in the industry adopts a closed section form, axial thrust is balanced mutually through a load hoop effect, the foundation pit is limited by terrain conditions, part of mountain area engineering projects need to be provided with an open arch foundation pit, foundation pit load cannot be balanced through a self structure, the angular point section size is large, the structural economy is poor, the system has high requirements on soil bodies behind arch supports, and the application of the supporting system has great limitation.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides a method for adjusting the internal force of an arch-shaped foundation pit supporting system. The method is characterized in that a prestress system tie bar cable is arranged at an arch base of an arch foundation pit supporting system, and the horizontal thrust of part of the arch supporting system is balanced by tensioning the tie bar cable to restrain the displacement of an arch top of the foundation pit along the tangential direction of the arch base. The structure stress system is optimized, the bearing capacity and the overall stability of the arch-shaped secant pile supporting structure are enhanced, meanwhile, the axial thrust of the arch abutment is balanced to a certain degree, the section size of the arch abutment is reduced, the requirement on a soil body behind the arch abutment is lowered, the stress of the structure is more reasonable, and the application range is wider.
The invention is realized in this way, construct a arch foundation ditch and support the systematic internal force adjustment method, characterized by that; construct an arch excavation supporting system internal force and adjust structure, include: an arch foundation pit supporting system and a prestress tie rod cable;
the arch foundation pit supporting system comprises an arch ring and an arch base; the prestressed tie bar cable is arranged at the top end of the arch support; the specific operation steps of this patent are:
(1) constructing an arch foundation pit supporting system, and reserving a tie bar cable duct by adopting a PVC pipe when constructing to the top surface of an arch base;
(2) excavating a foundation pit, and installing a prestress tie rod cable after excavating to a depth;
(3) tensioning the prestress tie rod cable according to the design load;
(4) and continuously excavating the foundation pit to the designed depth.
The method for adjusting the internal force of the arch foundation pit supporting system is characterized by comprising the following steps of (1) adjusting the internal force of the arch foundation pit supporting system; when the method is implemented; the prestressed tie-rod cable is made of steel strands, and is tensioned according to the designed load by a jack.
The method for adjusting the internal force of the arch foundation pit supporting system is characterized by comprising the following steps of (1) adjusting the internal force of the arch foundation pit supporting system; when the method is implemented; the arch foundation pit supporting system can be in any structural form such as an arch secant pile, an arch underground continuous wall, an arch steel structure and the like.
The invention has the following advantages: the invention provides a method for adjusting the internal force of an arch foundation pit supporting system, which has the following advantages and beneficial effects:
(1) the horizontal thrust of the arch support system is balanced by tensioning the tie bars, the displacement of the foundation pit arch top along the tangential direction of the arch support is restrained, a structural stress system is optimized, the section size of the arch support is reduced, and the economical efficiency of the structure is improved. Meanwhile, the internal force of the structure is reduced, and the safety and the stability of the foundation pit structure are improved;
(2) the requirement of the arch foundation pit on the soil body behind the arch base is reduced, and the application range of the open arch foundation pit supporting system is greatly widened.
Drawings
Fig. 1-2 are corresponding schematic structural views of the practice of the method of the present invention.
Wherein: the foundation pit supporting system comprises an arch foundation pit supporting system 1, a prestressed tie rod cable 2, an arch ring 3, an arch support 4 and a foundation pit bottom 5.
Detailed Description
The present invention will be described in detail with reference to fig. 1-2, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides an internal force adjusting method of an arch foundation pit supporting system through improvement, and in implementation, an internal force adjusting structure of the arch foundation pit supporting system is constructed, and the method comprises the following steps: an arch foundation pit supporting system 1 and a prestressed tie rod cable 2;
in implementation, the arch foundation pit supporting system 1 comprises an arch ring 3 and an arch base 4; the prestress tie rod rope 2 is arranged at the top end of the arch support 4;
the specific operation steps of this patent are:
(1) constructing an arch foundation pit supporting system, and reserving a tie bar cable duct by adopting a PVC pipe when constructing to the top surface of an arch base;
(2) excavating a foundation pit, and installing a prestress tie rod cable after excavating to a depth;
(3) tensioning the prestress tie rod cable according to the design load;
(4) and continuously excavating the foundation pit to the designed depth.
When the adjusting method is implemented; the prestress tie rod cable 2 is made of steel strands, and the prestress tie rod cable 2 is tensioned according to the design load by a jack.
When the adjusting method is implemented; the arch foundation pit supporting system 1 can be in any structural form such as an arch secant pile, an arch underground continuous wall, an arch steel structure and the like.
This patent has following advantage and beneficial effect:
(1) the horizontal thrust of the arch support system is balanced by tensioning the tie bars, the displacement of the foundation pit arch top along the tangential direction of the arch support is restrained, a structural stress system is optimized, the section size of the arch support is reduced, and the economical efficiency of the structure is improved. Meanwhile, the internal force of the structure is reduced, and the safety and the stability of the foundation pit structure are improved;
(2) the requirement of the arch foundation pit on the soil body behind the arch base is reduced, and the application range of the open arch foundation pit supporting system is greatly widened.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A method for adjusting the internal force of an arch foundation pit supporting system is characterized in that;
construct an arch excavation supporting system internal force and adjust structure, include: an arch foundation pit supporting system (1) and a prestress tie rod cable (2);
the arch foundation pit supporting system (1) comprises an arch ring (3) and an arch base (4); the prestress tie rod cable (2) is arranged at the top end of the arch support (4);
the method comprises the following specific operation steps:
(1) constructing an arch foundation pit supporting system, and reserving a tie bar cable duct by adopting a PVC pipe when constructing to the top surface of an arch base;
(2) excavating a foundation pit, and installing a prestress system rod cable (2) after excavating to the depth;
(3) tensioning the prestress tie rod cable (2) according to the design load;
(4) and continuously excavating the foundation pit to the designed depth.
2. The method for adjusting internal force of an arch-shaped foundation pit supporting system according to claim 1, wherein; when the method is implemented; the prestress tying rod rope (2) is made of steel strands, and the prestress tying rod rope (2) is tensioned according to the designed load by a jack.
3. The method for adjusting internal force of an arch-shaped foundation pit supporting system according to claim 1, wherein; when the method is implemented; the arch foundation pit supporting system (1) can be in any structural form such as an arch secant pile, an arch underground continuous wall, an arch steel structure and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060425.6A CN114232644A (en) | 2022-01-19 | 2022-01-19 | Internal force adjusting method for arch foundation pit supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210060425.6A CN114232644A (en) | 2022-01-19 | 2022-01-19 | Internal force adjusting method for arch foundation pit supporting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114232644A true CN114232644A (en) | 2022-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210060425.6A Pending CN114232644A (en) | 2022-01-19 | 2022-01-19 | Internal force adjusting method for arch foundation pit supporting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114232644A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1329971C (en) * | 1989-09-19 | 1994-06-07 | Allan T. Quaile | Segmented arch structure |
| KR101728700B1 (en) * | 2016-09-01 | 2017-04-20 | 주식회사 한국건설관리공사 | Reinforcement apparatus for earth retaining temporary facility and temporary structure having the same |
| KR20180064959A (en) * | 2016-12-06 | 2018-06-15 | 대구대학교 산학협력단 | retaining structure support method using tied-arch structure |
| CN113846652A (en) * | 2021-11-15 | 2021-12-28 | 福建路港（集团）有限公司 | Adjustable prestress stainless steel pipe arch foundation pit supporting system |
-
2022
- 2022-01-19 CN CN202210060425.6A patent/CN114232644A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1329971C (en) * | 1989-09-19 | 1994-06-07 | Allan T. Quaile | Segmented arch structure |
| KR101728700B1 (en) * | 2016-09-01 | 2017-04-20 | 주식회사 한국건설관리공사 | Reinforcement apparatus for earth retaining temporary facility and temporary structure having the same |
| KR20180064959A (en) * | 2016-12-06 | 2018-06-15 | 대구대학교 산학협력단 | retaining structure support method using tied-arch structure |
| CN113846652A (en) * | 2021-11-15 | 2021-12-28 | 福建路港（集团）有限公司 | Adjustable prestress stainless steel pipe arch foundation pit supporting system |
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